diff --git a/app/Services/DetectionService.php b/app/Services/DetectionService.php
index d2357b3..1a1cb5d 100644
--- a/app/Services/DetectionService.php
+++ b/app/Services/DetectionService.php
@@ -494,7 +494,7 @@ class DetectionService extends BaseService
             return success($order_detection['detection_no']);
         }
 
-        return success();
+        return success("");
     }
 
     /**